net: hns3: Remove tx ring BD len register in hns3_enet

There is no HNS3_RING_TX_RING_BD_LEN_REG register according
to UM, so this patch removes it.
Signed-off-by: Yunsheng Lin <linyunsheng@huawei.com>
Signed-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: Salil Mehta <salil.mehta@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/hisilicon/hns3/hns3_enet.c

@@ -2969,8 +2969,6 @@ static void hns3_init_ring_hw(struct hns3_enet_ring *ring)
 		hns3_write_dev(q, HNS3_RING_TX_RING_BASEADDR_H_REG,
 			       (u32)((dma >> 31) >> 1));
 
-		hns3_write_dev(q, HNS3_RING_TX_RING_BD_LEN_REG,
-			       hns3_buf_size2type(ring->buf_size));
 		hns3_write_dev(q, HNS3_RING_TX_RING_BD_NUM_REG,
 			       ring->desc_num / 8 - 1);
 	}

drivers/net/ethernet/hisilicon/hns3/hns3_enet.h

@@ -37,7 +37,6 @@ enum hns3_nic_state {
 #define HNS3_RING_TX_RING_BASEADDR_L_REG	0x00040
 #define HNS3_RING_TX_RING_BASEADDR_H_REG	0x00044
 #define HNS3_RING_TX_RING_BD_NUM_REG		0x00048
-#define HNS3_RING_TX_RING_BD_LEN_REG		0x0004C
 #define HNS3_RING_TX_RING_TAIL_REG		0x00058
 #define HNS3_RING_TX_RING_HEAD_REG		0x0005C
 #define HNS3_RING_TX_RING_FBDNUM_REG		0x00060